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Keywords: ChrysalisScudder.png Chrysalis Butterflies; their structure changes and life-histories with special reference to American forms Being an application of the Doctrine of descent to the study of butterflies With an appendix of practical instructions http //www archive org/details/butterfliestheir00scudrich 1881 Samuel Hubbard Scudder pd-old PD-old Butterflies Their Structure Changes and Life Histories Danaus plexippus pupae Images by Shyamal animals |